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Fix: check lttng-modules ABI version for RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS support
authorJonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Mon, 15 May 2017 19:37:21 +0000 (15:37 -0400)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Tue, 13 Jun 2017 16:29:59 +0000 (12:29 -0400)
The RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS was introduced in
lttng-modules ABI version 2.3. When interacting with a kernel tracer
with ABI versions < 2.3, pass zero as monitor_timer_interval to disable
the monitoring.

Warn during sessiond startup and channel enabling if not supported.

Fixes #1101

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

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